The Stainless Steel Mug Coffee Cup cup is made of stainless steel, which is rust-proof and corrosion-resistant, sturdy and durable and should not be broken. Double walled construction keeps hot things hot and cold things cold longer than ceramic cups.10oz capacity works well for an older child or adult. Perfect for using for tea,coffee, milk, cold and hot drink.Not only for great to use around the house or camping, picnicking and traveling, but also be a lovely creamer,espresso mug for grown ups.